package com.admin.generator.util;

import com.alibaba.fastjson.JSONObject;
import com.admin.common.constant.GenConstants;
import com.admin.common.utils.DateUtils;
import com.admin.common.utils.StringUtils;
import com.admin.generator.config.GenConfig;
import com.admin.generator.domain.GenTable;
import com.admin.generator.domain.GenTableColumn;
import org.apache.velocity.VelocityContext;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;

public class VelocityUtils {
    /**
     * 项目空间路径
     */
    private static final String PROJECT_PATH = "main/java";

    /**
     * mybatis空间路径
     */
    private static final String MYBATIS_PATH = "main/resources/mapper";

    /**
     * html空间路径
     */
    private static final String TEMPLATES_PATH = "main/resources/templates";

    /**
     * 设置模板变量信息
     *
     * @return 模板列表
     */
    public static VelocityContext prepareContext(GenTable genTable) {
        String moduleName = genTable.getModuleName();
        String businessName = genTable.getBusinessName();
        String packageName = genTable.getPackageName();
        String tplCategory = genTable.getTplCategory();
        String functionName = genTable.getFunctionName();

        VelocityContext velocityContext = new VelocityContext();
        velocityContext.put( "tplCategory", genTable.getTplCategory() );
        velocityContext.put( "tableName", genTable.getTableName() );
        velocityContext.put( "functionName", StringUtils.isNotEmpty( functionName ) ? functionName : "【请填写功能名称】" );
        velocityContext.put( "ClassName", genTable.getClassName() );
        velocityContext.put( "className", StringUtils.uncapitalize( genTable.getClassName() ) );
        velocityContext.put( "moduleName", genTable.getModuleName() );
        velocityContext.put( "businessName", genTable.getBusinessName() );
        velocityContext.put( "basePackage", getPackagePrefix( packageName ) );
        velocityContext.put( "packageName", packageName );
        velocityContext.put( "author", genTable.getFunctionAuthor() );
        velocityContext.put( "datetime", DateUtils.getDate() );
        velocityContext.put( "pkColumn", genTable.getPkColumn() );
        velocityContext.put( "importList", getImportList( genTable.getColumns() ) );
        velocityContext.put( "permissionPrefix", getPermissionPrefix( moduleName, businessName ) );
        velocityContext.put( "columns", genTable.getColumns() );
        velocityContext.put( "table", genTable );
        if (GenConstants.TPL_TREE.equals( tplCategory )) {
            setTreeVelocityContext( velocityContext, genTable );
        }
        return velocityContext;
    }

    public static void setTreeVelocityContext(VelocityContext context, GenTable genTable) {
        String options = genTable.getOptions();
        JSONObject paramsObj = JSONObject.parseObject( options );
        String treeCode = getTreecode( paramsObj );
        String treeParentCode = getTreeParentCode( paramsObj );
        String treeName = getTreeName( paramsObj );

        context.put( "treeCode", treeCode );
        context.put( "treeParentCode", treeParentCode );
        context.put( "treeName", treeName );
        context.put( "expandColumn", getExpandColumn( genTable ) );
        if (paramsObj.containsKey( GenConstants.TREE_PARENT_CODE )) {
            context.put( "tree_parent_code", paramsObj.getString( GenConstants.TREE_PARENT_CODE ) );
        }
        if (paramsObj.containsKey( GenConstants.TREE_NAME )) {
            context.put( "tree_name", paramsObj.getString( GenConstants.TREE_NAME ) );
        }
    }

    /**
     * 获取模板信息
     *
     * @return 模板列表
     */
    public static List<String> getTemplateList(String tplCategory) {
        List<String> templates = new ArrayList<String>();
        templates.add( "vm/java/domain.java.vm" );
        templates.add( "vm/java/mapper.java.vm" );
        templates.add( "vm/java/service.java.vm" );
        templates.add( "vm/java/serviceImpl.java.vm" );
        templates.add( "vm/java/controller.java.vm" );
        templates.add( "vm/xml/mapper.xml.vm" );
        if (GenConstants.TPL_CRUD.equals( tplCategory )) {
            templates.add( "vm/html/list.html.vm" );
        } else if (GenConstants.TPL_TREE.equals( tplCategory )) {
            templates.add( "vm/html/tree.html.vm" );
            templates.add( "vm/html/list-tree.html.vm" );
        }
        templates.add( "vm/html/add.html.vm" );
        templates.add( "vm/html/edit.html.vm" );
        templates.add( "vm/sql/sql.vm" );
        return templates;
    }

    /**
     * 获取文件名
     */
    public static String getFileName(String template, GenTable genTable) {
        // 文件名称
        String fileName = "";
        // 包路径
        String packageName = genTable.getPackageName();
        // 模块名
        String moduleName = genTable.getModuleName();
        // 大写类名
        String className = genTable.getClassName();
        // 业务名称
        String businessName = genTable.getBusinessName();

        String javaPath = PROJECT_PATH + "/" + StringUtils.replace( packageName, ".", "/" );
        String mybatisPath = MYBATIS_PATH + "/" + moduleName;
        String htmlPath = TEMPLATES_PATH + "/" + moduleName + "/" + businessName;

        if (template.contains( "domain.java.vm" )) {
            fileName = StringUtils.format( "{}/domain/{}.java", javaPath, className );
        } else if (template.contains( "mapper.java.vm" )) {
            fileName = StringUtils.format( "{}/mapper/{}Mapper.java", javaPath, className );
        } else if (template.contains( "service.java.vm" )) {
            fileName = StringUtils.format( "{}/service/I{}Service.java", javaPath, className );
        } else if (template.contains( "serviceImpl.java.vm" )) {
            fileName = StringUtils.format( "{}/service/impl/{}ServiceImpl.java", javaPath, className );
        } else if (template.contains( "controller.java.vm" )) {
            fileName = StringUtils.format( "{}/controller/{}Controller.java", javaPath, className );
        } else if (template.contains( "mapper.xml.vm" )) {
            fileName = StringUtils.format( "{}/{}Mapper.xml", mybatisPath, className );
        } else if (template.contains( "list.html.vm" )) {
            fileName = StringUtils.format( "{}/{}.html", htmlPath, businessName );
        } else if (template.contains( "list-tree.html.vm" )) {
            fileName = StringUtils.format( "{}/{}.html", htmlPath, businessName );
        } else if (template.contains( "tree.html.vm" )) {
            fileName = StringUtils.format( "{}/tree.html", htmlPath );
        } else if (template.contains( "add.html.vm" )) {
            fileName = StringUtils.format( "{}/add.html", htmlPath );
        } else if (template.contains( "edit.html.vm" )) {
            fileName = StringUtils.format( "{}/edit.html", htmlPath );
        } else if (template.contains( "sql.vm" )) {
            fileName = businessName + "Menu.sql";
        }
        return fileName;
    }

    /**
     * 获取项目文件路径
     *
     * @return 路径
     */
    public static String getProjectPath() {
        String packageName = GenConfig.getPackageName();
        StringBuffer projectPath = new StringBuffer();
        projectPath.append( "main/java/" );
        projectPath.append( packageName.replace( ".", "/" ) );
        projectPath.append( "/" );
        return projectPath.toString();
    }

    /**
     * 获取包前缀
     *
     * @param packageName 包名称
     * @return 包前缀名称
     */
    public static String getPackagePrefix(String packageName) {
        int lastIndex = packageName.lastIndexOf( "." );
        String basePackage = StringUtils.substring( packageName, 0, lastIndex );
        return basePackage;
    }

    /**
     * 根据列类型获取导入包
     *
     * @param column 列集合
     * @return 返回需要导入的包列表
     */
    public static HashSet<String> getImportList(List<GenTableColumn> columns) {
        HashSet<String> importList = new HashSet<String>();
        for (GenTableColumn column : columns) {
            if (!column.isSuperColumn() && GenConstants.TYPE_DATE.equals( column.getJavaType() )) {
                importList.add( "java.util.Date" );
            } else if (!column.isSuperColumn() && GenConstants.TYPE_BIGDECIMAL.equals( column.getJavaType() )) {
                importList.add( "java.math.BigDecimal" );
            }
        }
        return importList;
    }

    /**
     * 获取权限前缀
     *
     * @param moduleName   模块名称
     * @param businessName 业务名称
     * @return 返回权限前缀
     */
    public static String getPermissionPrefix(String moduleName, String businessName) {
        return StringUtils.format( "{}:{}", moduleName, businessName );

    }

    /**
     * 获取树编码
     *
     * @param options 生成其他选项
     * @return 树编码
     */
    public static String getTreecode(JSONObject paramsObj) {
        if (paramsObj.containsKey( GenConstants.TREE_CODE )) {
            return StringUtils.toCamelCase( paramsObj.getString( GenConstants.TREE_CODE ) );
        }
        return "";
    }

    /**
     * 获取树父编码
     *
     * @param options 生成其他选项
     * @return 树父编码
     */
    public static String getTreeParentCode(JSONObject paramsObj) {
        if (paramsObj.containsKey( GenConstants.TREE_PARENT_CODE )) {
            return StringUtils.toCamelCase( paramsObj.getString( GenConstants.TREE_PARENT_CODE ) );
        }
        return "";
    }

    /**
     * 获取树名称
     *
     * @param options 生成其他选项
     * @return 树名称
     */
    public static String getTreeName(JSONObject paramsObj) {
        if (paramsObj.containsKey( GenConstants.TREE_NAME )) {
            return StringUtils.toCamelCase( paramsObj.getString( GenConstants.TREE_NAME ) );
        }
        return "";
    }

    /**
     * 获取需要在哪一列上面显示展开按钮
     *
     * @param genTable 业务表对象
     * @return 展开按钮列序号
     */
    public static int getExpandColumn(GenTable genTable) {
        String options = genTable.getOptions();
        JSONObject paramsObj = JSONObject.parseObject( options );
        String treeName = paramsObj.getString( GenConstants.TREE_NAME );
        int num = 0;
        for (GenTableColumn column : genTable.getColumns()) {
            if (column.isList()) {
                num++;
                String columnName = column.getColumnName();
                if (columnName.equals( treeName )) {
                    break;
                }
            }
        }
        return num;
    }
}